Spec me a PAYG Sim please

[SexyGreyFox]

I'm positive a load of you have done this.
I'm already on EE but I want to put a spare SIM in my dual sim phone that perhaps doesn't use the EE network.
All I'm after is a one off payment because I may never use it but it's there if I need to.

Any advice appreciated

 

[SexyGreyFox]

Three 123 sounds great but it still means I will have to spend £30 a year to keep it going when I might not even use it.
I want to pay £10 and it could last a lifetime by making one quick text every 120 days to keep it active.